Assigitob



l. H. POPE. NAIL FEEmNG MecHANzsrvl.

APPLICATION FILED MAILS. 1916.

Patented Dec. 23, 1919.

3 SHEETS-SHEET I.

J0 m Z1@ llfmli 195 @mm 5572176 y llln ummm yw/fw Aw vJ. H. POPE. NAIL FEEDING MECHANSM. APPLICATION man MAM. 191e.

Patented Dec. 23, 1919.

3 SHEETS-SHEET 2- 1. H. POPE. NAIL FEEDING MECHANISM,

l APPLICATION FILED MAR- 3, 1916. 1,325,751

Patented Dec. 23, 1919.

avsHEETsJsHEET sv.

JGSEPH H. PUPE, F HAMILTN, MASSACHUSETTS, ASSTGINOR, 'BY MESES@ ASSIGNMENTS,

TO UNITED SHOE MACHINERY CGRPORATTON, 01E' PATERSON, NEW JERSEY, it. GOR- PRATION OF NEW JERSEY.

NAIL-FEEDING MECHANISM.

asentar.

Application led March 3, 1916.

To all whom t may concern:

Be it known that l, Josemi H. Porn, a citizen of the United States, residing at l-lamilton, in the county of Essex and State of Massachusetts, have invented certain lmprovements in Nail-Feeding Mechanism, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the severa-l figures.

rllhis invention relates to nail feeding mechanism for use in heeling machines.

ln operating machines of this character the problem of supplying the attaching nails with sufficient rapidity and accurately arranged right end up has presented many difficulties. The attempt has been made heretofore to supply the attaching nails to a perforated block or holder and then to conduct the nails from the block to the driver passages of the machine. lleretofore no machine of this kind has been successfully operated. ln one of its important aspects the present invention consists in improved mechanism for handling` a nail supplying block. Features of this mechanism will be pointed out in detail hereinafter.

another feature of the invention consists in a safety locking mechanism for preventing the nail block from delivering a second load of nails until the loader has been moved to discharge the previous load of nails to the die plate of the machine.

That feature of the invention which relates to the loader consists in the provision. of a transverse slot through which the operator may readily view the attaching nails to make sure that the full number has been supplied to the loader. Heretofore there has been no way to inspect the nails after they have once been delivered to the loaden except by springing downwardly the coven plate and allowing the nails to project below the bottom surface of the loader'.

ln order to prevent the delivery of a second load of nails to the die plate before the 'load previously delivered has been driven,

the invention contemplates as another feature a locking device for the loader arm arranged to be controlled by the movement of the heel and toplift holder, the construc- Specification of Letters Patent.

Patented Dec.. 23, 1919.

Serial No 31,373.

tion being such that when one load of nails has been delivered, movement of the loader to deliver a second load of nails is prevented until the toplift holder has been turned to present a new heel in attaching position.

As herein shown a further locking device .is provided for the mechanism which operates the nail supplying block, the device being so arranged that movement of the block to deliver a second load of nails is prevented until the loader has heen moved to discharge the previous load.

rlhese and other features of the invention will be hest understood and appreciated from the following description of a pre* ferred embodiment thereof selected for purposes of illustration and shown in the accompanying drawings, in which,

Figure l is a view in front elevation of the well known Lightning Nailing Machine having the present invention embodied therein; i

Fig. 2 is a view in perspective of portions of the automatic measuring mechanism;

Figs. 3 and 4- are views in perspective of the nail block handling mechanism;

Fig. 5 is a view in perspective illustrating the heel and toplift holder operating mechanism and the safety locking devices;

Fig. G is a fragmentary view of the nail block guideway and associated mechanism;

Fig. 7 illustrates the foot plate of the nail transferring mechanism showing also a portion of the retaining frame;

Fig. 8 is a detail view of a portion of the safety locking mechanism, and

Fig. 9 is a sectional view of the loader and foot plate.

The machine frame 2 carries a stationary die plate 4 having a series of passages, as shown in llig. 5, for the drivers. Beneath the die plate is located the jack 6 upon which the lasted shoe is placed preparatory to the operation of the machine, the heel to be nailed being held in place upon the under side of the die plate by clamping arms 7. A driver gang 8 is mounted in a cross head 10 carried at the upper ends of the two side rods 12 which are arranged to reciprocate in vertical hearings in the machine frame. Secured to the lower ends of the side rods is a second cross head to which motion is imparted from the main shaft 18 through an eccentric strap 16.

To the front portion of the machine frame 2 is secured a stationary block 2O above which is located the jack carriage support 22. The latter is arranged for a limited vertical movement in a vertical guideway formed part-ly in the machine frame and partly by gibs bolted thereto. The support 22 and all the parts carried thereby, including the jack, are moved vertically by power driven means when the machine is started and after the measuring operation hastaken place. For this purpose a pair ot eccentric cams are mounted one in the stationary block 20 and the other in the support 22. These are oscillated by connections witlrthe side rods during the initial part of the downward movement ot the cross head. ln the present drawings the connecting mechanism is omitted tor the sake of clearness, being substantiallyT the same as corresponding mechanism disclosed in my prior Patent No. 446,885 dated February 24, 1891.

Above the jack carriage support 22 and guided in the same ways as the latter, is located the jack carriage 24. The vertical position of the carriage is determined by a large screw 26 threaded at its upper end into the carriage and resting at its lower head on the jack carriage support 22. The screw 26 .is provided with elongated gear teeth meshing with a horizontally movable rackv 28 by the actuation of which the measuring operation is eil'iected as will be presently described. rlhe jack carriage 24 is formed at its upper side with substantially horizontal guideways in which slides the `iack 6. llt will be understood that the jack is pulled forwardly in the ways to receive a shoe and then pushed rearwardly into operative position beneath the die plate preliminarily to starting the machine.

The mechanism thus far described is substantially similar to the corresponding' mechanism of the well known Lightning Nailing Machine. Such portions of the machine as are not herein specifically described are similar to the corresponding parts shown in my prior patent above identitied.

rlhe measuring operation is effected by rotating the screw 26 to elevate the ack and thus bring `the two parts of the work into engagement, pressing them together with a predetermined measuring pressure independently of the thickness of the work. The source of motive power for actuating the rack 28 in carrying out the mez'isuring` operation consists in a long spring 42 acting in compression. The spring is arranged to encircle a tube 50, see Fig. 2, which is secured at its upper end to a bracket 52 bolted on a vertically movable bar 54. The tube 50 has a flange 48 at its lower end upon which the spring 42 rests. Looscly mounted to telescope within the tube 50 is a rod 4S) which is secured at its lower end to the machine ranie and provided at its upper end with a cross pin projecting outwardly through a slot in the tube 50 and seated in a. collar 46 bearing upon the upper end of the spring 42.

lt will be seen that, when the two telescopic members 49 and 50 are elongated by the upward movement of the tube 50, the spring 42 is compressed between the flange 48 and the collar 46. rlhis takes place when the bar 54 is moved upwardly by the power of the machine, the bar being latched in its upper position with the spring 42 held under compression.

The bar 54 is guided for vertical nievement at its upper end by passing through a vertical opening in a box 56 rigidly bolted to the lett side rod 12. At its lower end the bar 54 is pivotally connected to one arm of a triangular lever 30 pivoted upon a stud 58 projecting from the stationary block 20. The bar 54 extends below its point of connection with the lever 30 and is slotted to receive a spring 60 which permits lost niotion to occur between the bar 54 and the lever 30 when the rod is moved upwardly by the power ot the machine as will presently appear. The lever' 80 is connected through a short link 29 to the rack 28; It will be apparent that when the bar 54 is elevated and the spring 42 compressed the rack 28 will be moved to the right and the screw 26 turned in the direction to lower the jack 6. On the other hand, when the bar 54 is tripped, and the spring 42 permitted to expand and move the bar 54 downwardly, the rack 28 will be moved to the left through the connections described and the jack elevated to edect the measuring operation.

The bar 54 is provided near its upper end and upon its rear side with a catch or shoulder 62. The box 56 carries a pivoted dog 64 which is arranged to engage the shoulder 62 in the upward movement of the slide rod carrying the bar 54 upwardly and holding it in the position shown in Fig. 1 with the spring 42 under compression. The starting lever 66 of the machine hasl con nections with the dog 64 such that in its initial movement the dog is disengaged from the shoulder 62 whereupon the bar 54 is free to move downwardly under the actuation of the spring 42 thus effecting the measuring operation as above outlined.

The starting lever 66 is connected through a treadle rod 72 to a treadle 70 by which the operator initiates the measuring operation. The starting lever 66 is also connected to the main clutch of the machine by mechanism not here illustrated but which correlill spends to that of my earlier patent above identiiied. Ilhe arrangement is `such that the continued depression of the treadle, after the measuring operation has been effected, throws the clutch and starts the power operation of the machine.

ln the usual operation of the machine the bar 54 is elevated by the upward movement of the side rod but it may happen that it is desired to eect this operation without starting the machine or to lift the bar 54: temporarily to depress the jack and thus afford opportunity to adjust the position of the heel or shoe before th-e attaching nails are driven. To this end a.` lever la is mounted upon the stud 58 of the lever 30 and is lso arranged that it can be swung upwardly to turn the lever 30 in a clockwise direction by coming into engagement with the pivot pin by which the lever 30 is connected to the bar 54. IThe inner end of the lever 4.a normally projects beneath the pin 91 set in the block 2O which acts as a stop for the lever 30 and also for the lever ta. During the normal operation'of the machine the lever 411- remains at rest in the position shown in Fig. 1., being operated only when occasion demands,

ln order to safeguard the operator by pre venting the inadvertent starting of the machine before the jack has been. moved inwardly to position the work properly, a safety lever 7a is pivotally mounted on an arm projecting1 from one of the gibs of the machine frame and arranged to stand normally with its inner arm in the path of the jack 6. The outer and shorter arm of the lever (t extends under a locking` piece 76 rigidly secured to the upper end of the treadle rod 72. .et spring pressed pin `76 bears upon the rear side of the inner arm of the lever 74 and swings it normally into" lockingA relation with the piece 6 as shown in Fig. 2. When the jack, however, is pushed inwardly into operative position it encounters the lever 74e and swings its outer end forwardly into a position in which the locking piece 76 will clear it when the treadle is depressed.

rl`he positionof the shoeupon the jack is controlled from front to rear by a back gage 80 adjustably mounted in the machine frame beneath the die plate fi. rllhe back gage 80 is carried by a horizontally dispos-ed screw having a beveled gear 82 secured thereto and arrangedto mesh with a beveled gear 8a upon the rear end of a shaft 86 having a knurled head at its outer end. The shaft 86 is journaled in bearings formed in a collar 88 which surrounds theright side rod a-nd rests upon the upper part of the machine frame. The shaft extends obliquely inwardly to the back gage. its head or hand nut being located conveniently within the reach of the operator.

an oscillating` heel and toplift holder is pivotally mounted at the rear of the die plate i and arranged to present the heel and topliit blanks successively in position beneath the driver passages. rlhe holder includes a pair of toplift clamping arms 90 and a pair of heel engaging arms 7. it spanlrer plate 91 is disposed above the toplift clamping arms 90 and arranged to be interposed between the toplift and the lower face of the die plate during the spanking operation. rlhe movement of the heel and toplift carrier is controlled by mechanism which will now be described. lin initial position the holder is positioned with the heel clamping arms 7 beneath the die plate and the toplift clamping arms 90 proj ecting toward the right hand side of the machine. 'lhe holder is provided with an arm 92, see Fig. 5, extending rearwardly and carrying a downwardly projecting rod 9a connected at its lower end to a horizontally extending rod 96. The rod 96 has an adjustable turn buckle in its length and is pivotally connected to the rear end of a lever 98 pivotally mounted `on a stud 100. The stud 1.00 projects downwardly from a braclret 10Ql carried by the collar 80. The stud 100 is encircled by a torsion spring 1.01 which tends normally to throw the rear end of the lever toward the right and, through the connections above described, to turn the toplift clamping arms 90 into position beneath the die plate a. This action of the spring 10a-7 however, is prevented during a portion of the cycle of the machine by a latch lever 106 pivoted upon a horizontal stud 106 to the frame of the machine. llhe lever 106 has a horizontal arm which is arranged to engage with the flat side of a pin 110 set in the handle or front end of the lever 98. The lever 98 is made in two pieces which are arranged to have a limited relative movement in a horizontal plane. '.lhe forward end of the rear part of the lever 98 is provided with a cased spring 112 wl'lich tends normally to swing the handle end of the lever inwardly when permitted to do so.V

The latching lever 106 is lifted automatically to disengage the pin 110 during the i'lpward movement of the side rod l2 at the conclusion of the nail driving operation.

To this end the downwardly extending arm of the latch lever 106 is provided with a pivoted switch cam 11a with which coperates a pin 116 set in a collar 110 fast upon the side rod 12. The cam 114: is so disposed that when the side rod and the pin 116 are moved downwardly the cam piece will be displaced inwardly at its lower end without affecting the position of the latching lever 106. ln the upward movement of the side rod, however, the pin 116 encounters the other face of the cam 114C and acts to swing the latching lever 106 in a contra lill clockwise direction thus elevating its horizontal arm and releasing the pin 110 in the lever 98. This movement of the lever 106 takes place in opposition to a spring 120 interposed between it and a post on the bracket 102.

As soon as the arm of the latching lever 106 is elevated the forward or handle end of the lever 98 moves inwardly carrying the pin 110 beneath the arm of the lever and permitting the lever 98 to swing outwardly at its rear end thereby turning the heel and toplift holder to carry the toplift clamping arms beneath the die plate. This feature of construction is important in that the 0scillation of they latching lever is rapidly effected and if the catch 110 were not promptly moved out of range of the lever 106 it would be caught again by the lever 106 before the slower moving holder would permit it to move.

In order to cushion the action of the holder, dash pot mechanism is provided including a tube 122 set in the machine frame and having its plunger connected by a link 124 to an adjustable clamping piece 126 fast upon the rod 96.

y The attaching` nails are supplied to the die block by a loader block 130 carried in an oscillating loader arm 132 pivotally mounted upon the right side rod 12. The arm 132 of the loader block extends outwardly beyond the block 130 and is provided with a handle 134 by which the operator swings it from the nail receiving position shown in 'Figs 3 and 4 to nail delivering position above the passages in the die block. A plate 131 covers the lower face of the loader block 130 and prevents the nails from falling out of it during its movement into deliveringposition.

Safety mechanism is provided for preventing a second movement of the nail loader into .delivering position after the passages in the die block have once been supplied with nails and before these nails have been driven, As herein shown, this mechanism is controlled by the movement of the heel and toplift holder. To this end there is provided upon the loader arm 132 a block 136 having a notch in its upper face which, in the nail receiving position of the loader arm, is disposed beneath a locking pin 138 mounted for vertical movement in bearings carried by a stationary bracket 140. lVhen the locking pin. 138 is lowered into the notch in the block 136 the loader arm is locked positively against movement from nail receiving position. The locking pin 138 is connected to a flexible wire inclosed in a spring tube 142, see Fins. 5 and 8, which extends to an angular bracket 144 located at the rear of the die plate 4 above the heel and toplift holder. The bracket 144 is provided with bearings for a vertically movable rod 146, see F ig. 8. The rod 146 is connected to one arm of a bell crank lever 148 pivotally mounted upon an ear on the bracket 144. The downwardly extending arm of the lever 148 carries a pivoted tripping piece 150. The tripping piece 150 is arranged to vield when moved in one direction, e'. c., upwardly` but to engage a stop pin on the lever 148 and swing the latter when it is moved in the opposite direction.

The tripping piece 150 is operated by a tripping plate 152 secured to the rear side of the heel and toplift holder. A spring encircles the rod 146 beneath the arm of the lever 148` normally lifts the rod and through the flexible connection depresses the locking pin 138, the supposition being that one load of nails has now been delivered to the die plate. It is therefore impossible to move the loader arm until the locking pin 138 has been lifted and this is effected through the mechanism above described by swinging the heel and toplilt holder, first to carry the toplift holding arms 90.into position beneath the die plate, and then in the opposite direction to carrv the heel holding arms 7 into opcrativeposition. In these two movements it will be seen that the tripping plate 152 is lirst carried beneath the pivoted tripping piece 150 while the latter moves idly and is then moved reverselv engaging the tripping piece 150 and swinging the horizontal arm of the lever 148 downwardly, thus lifting the locking pin 138 as will be apparent. The loader arm is displaced immediately so as to carry the locking block 136 out from beneath the locking pin 138. This is effected by a spring pressed plunger 154 carried in the lower end of a ratchet lever 156 the purpose of which will be presently described.

The bracket 102 carries a pair of vertical rods 160 which carry at their upper ends a stationary frame 162 shaped to constitute a horizontal guideway. Inclined bracing rods 164 extend between the rods 160 and the forward end of the frame 162. The frame 162 has a pair of parallel flanges 166 upon which slides a carriage 168 having a handle 170 arranged to bridge its forward ends. The carriage 168 is shaped to receive one of the nail carrying blocks 172, being provided at its rear end with a pair of spring pins 174 and at its front end with a spring latch piece 176 which coperates to hold the block in place in the carriage.

The nail supplying blocks are provided with parallel rows of nail receiving holes, one row being designed to hold all the nails required to nail a single heel. Nails of any length may be supplied to the block or nails of various lengths may be supplied to the same row of holes, where, for instance, it is desired to use longer nails at the rear of the heel than at its sides. A sheet metal inserer plate is held upon the lower surface of the block to retain the nails, the plate having1 flanges shaped to slide in grooves in the edges of the block.

ln the operation of the machine the nail block 17 2, provided with its cover plate 178, is slipped into the carriage 168 when the latter occupies a position at the forward end of the guideway in the frame 162. After the block 172 has been placed in the cz'ufriage the carriage is pushed rearwardly to the limit of its path, then occupying the position shown in llig. 8. ln this movement the rear edge of the cover plate 178 encounters a stationary pin 180 set in one side of the frame 162 and is arrested in such position that its rear edge just covers the row of openings 182 which lead to the nail guiding tubes 18-1. llhen the block 172 is in this position the nails rest at their' lower ends upon a plate 186. which forms the bottom of the guideway.

The plate 186 is of r silient nature and so arranged that its forward edge may. be elevated when desired. For this purpose a shaft 188 is journaled in bearings formed on the under side of the frame 162 and provided near its ends with cams 190 arranged to act against the bottom of the plate 186 through slots formed in the bottom o-f the frame. A crank arm 192 is secured to the shaft 188 and pivotally connected. topa sliding bar 1941 which extends forwardly and is connected through a linlr 196 to a hand lever 198 pivotally mounted between ears 206 at the forward end of the frame 162. 1t will he seen that when the finger lever 198 is pulled forwardly the shaft 188 is turned and the cams 190 act to elevate the front edO'e of the plate 186.

ne purpose of elevating the plate 186 is to elevate the nails not already discharged suticiently to enable them to be brought over the cover plate 178 in case it is desired to remove the block 172 from the machine before its supply of vnails has been en hausted. 'llhe elevated edge of the plate 186 also supplements the pin 180 as a stop to prevent the rearward movement of the cover plate 178 when the carriage `168 is moved into its initial position.

r1`he finger lever 198 is also designed to move the cover plate 178 rearwardly sutliciently to cover the openings 182 when it is operated to elevate the plate 186. r1`his movement of the plate prevents the dis-' charge of nails to the nail guiding tubes when the carriage and block 17 2 are moved forwardly by hand preparatory to` remov-` ing the block. y

1n the normal operation of themachine the carriage 168 and the nail bloclr are moved intermittently forwardly to discharge one row of nails after another to the openings 182. 11s herein.showna mitted to do so.

this ef ,i

fected by mechanism operated by the loader arm 182. lhe carriage 168 is provided at one side of its lower face with a raclr 202, the raclr extending beneath the lower surface of the guideway 166. r11`he ratchet lever 166, above mentioned` is pivotally mounted upon a` bracket 201 secured to one of the rods 166 and carries at its upper end a dog 266 which coperates with. the teeth of the ratchet 262. r1`he bracket piece 2011. is provided with a rearward extension having a casing 208 for a spring pressed pin which tends normally to throw the lower'end of the ratchetlever 156 forwardly when perrllhe lower end of the ratchet lever 156 is itself provided with a i spring pin 1511-, arranged to bear against the rear side of the end of the loader arm 182. 1t will be understood that when the loader arm is moved outwardly into nail receiving position it encounters the lower end of the ratchet lever 166, swinging. the same rearwardly and advancing the carriage 168 through the ratchet 202. r1`he spacing of the ratchet teeth corresponds to the spacing of the rows of holes in the hloclr 172 so that at each forward movement of the carriage a new row of holes 1s brought over the openings 182. llllhen the loader arm 182 has been movedto the end of its path it is locked in position by the locking pin 188 as already explained. i

ylFhe carriage 168 is arranged so that it may be freely moved rearwardly and mechanism is provided for frictionally retarding its forward movement to prevent overthrow by the ratchet lever 156 which would result imperfectly registering the holes in the bloclr with the openings 182. To this end there is provided .a hollow post 210 upon the lower side of the carriage 168 and in this post is mounted a 'friction bloclr connected at its lower end to a pivoted cam piece 212. The cam piece is pivotally mounted in the post 210 and provided with an outwardly extending pin 2111 by which the cam piece 212 maybe oscillated to raise the fric tion hloclr into engagement with the bottom of the guide bar 166 or to lower the friction bloclr away from the bar. rlhese movements are brought about automatically by a strilring piece 216 secured to the rod 160 and a striking piece 218 projecting downwardly from the frame 162 near its forward end. lll/'hen the carriage is moved rearwardly to its initial position the pin 21a encounters the striking piece 216 and the cam 212 is rocked forwardly, thus putting on the friction. l/Vhen the carriage reaches the limit of its forward movement with the empty block the pin 2111 encounters the striking piece 21.8"and is rocked rearwardly thus releasing the friction and leaving the carriage freely 'movable 1n addition to the safety mechanism aln readyl described, which prevents movement of the loader arm 132 before the heel and toplift holder has been turned to position a heel for nailing,v there is also provided safety mechanism for preventing movement of the ratchet lever 156 to advance the block 172 and discharge a row. of nails until after nails already supplied to the loader have been delivered .to the nail block 4. To this end the loader arm is provided with a cam 220 which is arranged to coperate with a pin 222 set in a slide bar 224 for causing horizontal reciprocation of the bar. The bar 224 carries upon its rear side a pin 226 arranged to engageV a bell crank lever 228 pivotally mounted in the bracket 144 and of similar construction to the lever 148 already described and shown in Fig. 8. The lever 228 has a flexible connection through the spring tube 230 to a locking pin 232 mounted to slide in the bracket piece 204 and arranged to enter a socket formed in the side of the ratchet lever 156. The arrangement of the parts above described is such that the locking pin 232 is Withdrawn from its socket only when v the slide bar 224 is moved to its extreme left hand position as shown in Fig. 5 by movement of the loader arm sufficient to discharge the nails carried thereby to the die block. The lever 156' is locked in the position it occupies at the end of its feeding stroke by thelocking pin 232, and the springi pressed pin in the casing 208 moves the lever reversely when the locking pin is withdrawn.

The nail guiding tubes 184 are mounted in a removable frame 240 having at its upper end a plate arranged to fit in a dovetailed guideway formed in the llower side of the frame 162 as shownin Figs. 4 and 6. At its -forward edge the top plate of the frame 240 is provided with an ear 242 arranged to fit v between a pair of ears 244 projecting downwardly from the frame 162. A removable pin 246 ypasses through the ears 242 and 244 and so holds the frame 240 in place.

The side portionsor arms of the frame 240 are flanged at their lower ends tol receive a removable foot plate 252 which is detachably secured in place by'a pair of spring pins 250.

The removable footy plate 252 is bolted to a rim 248 and receives the lower end of the nail guiding tubes 184. It will be understood'that in changing from Vone size of heel to another the. frame'240 may be removed andy another frame having a different arrangement of guiding tubes may be substituted. Further, in case of damage to a frame or of radical change of style, the foot plate 252 may be, removed and .another of di'iferentzdesi gn substituted..

The foot plate 252 is arranged to discharge nails tothe loader block 130. The loader block 130 is made in two sections with an opening between them in order that the operator may tell at a glance whether or not the attaching nails have been supplied thereto. This is of great convenience when attaching nails shorter than the thickness of the loader block are employed.

The operation of the machine will be apparent from the foregoing description and may be outlined as follows: The machine comes to rest with its elements in the positions shown in Fig. 1, except that the toplift clamping arms 90 instead of the heel holding arms 7 are located beneath the die block and the lever 98 occupies its inner or left hand position. As shown in Fig. 1 the bar 54 has been moved upwardly and latched in position with the spring 42 under com )rcssion. The operator first inserts a toplift bctween the arms 90 and then swings the lever 98 outwardly thus bringing the heel holding arms 7 beneath the die block and latching the lever 98 by the lever 106 in the position shown. This movement of the heel and toplift holder releases the locking stud 138 frecing the loader arm so that the operator may now swing it inwardly to discharge the attaching nails to the die block. This movement of the loader arm retracts the locking pin 232 to free the ratchet lever 156 and in the reverse movement of the loader arm the lower end of the lever 156 is encountered and the carriage 168 moved forwardly to discharge the nails from a row of the holes in the block 172 into the nail passages 182 through which they pass to the loader arm.

The shoe is then placed upon the jack 6 and then moved rearwardly to carry the heel seat of the shoe beneath the heel to be attached and in this movement of the jack the safety lever 74 is moved to release the starting mechanism. The operator next depresses the treadle which first moves the dog 62 to release the bar 54 permitting the spring 42 to expand and elevate the jack to effect the measuring operation. Continued depression of the treadle 70 trips the main clutch of the machine whereupon the jack carriage support is elevated to apply an increased pressure to the work, the drivers acting to drive the attaching nails and the cross head is then elevated to its initial position. During this latter movement the bar 54 is again elevated and the latching lever 106 is oscillated to release the lever 98 and permit the heel and toplift holder to swing the toplift into position above the attached heel. Both of the locking studs 232 and 138 are now operative so that it is impossible for the operator to move the loader arm. The treadle 70 is again depressed, the work measured as before and the toplift finally spanked in place whereupon the completely heeled shoe may be rcmoved lfrom the machine in readiness for a repetition of the cycle.

Those features of the invention that relate to the mechanism for attaching heels Cit ` inserer and top lifts, and which do not relate to the nail feeding` mechanisii'i per se, are not claimed herein, but :toi-m the subject-matter et a divisional application iiled April Qd, 1918, Serial No. 230,428.

Having thus described my invention, l claim as new and desire to secure by Letters Patent oi? the United States;

l. i machine oi? the class described, having, in combination, a guideway, a carriage movable in the guidewajv and shaped to receive a nail bloclr provided with acover plate, means :tor arresting thecover plate when the carriage is moved in one direction to uncover all the nail holes, and means 'tor intermittently advancing the carriage `into position uponthe cover plate.

, lli machine ot the class described, having, incombinaticn, a guideivay, carriage constructed and arranged 'to receive a nail bloclr with acover plate and being movable with the nail bloclr in one direction while the cover plate is held stationary, and means iter intermittently moving the carriage to discharge nails from the nail bloclr and to ride over the cover plate and close the holes ot the nail block.

3. A machine oli the class described, having, in combination,a movable carriage for a nail bloclr, yielding clamping means arranged to act on the fron-t and rear ends of the bloclr and hold it detachablj,T in the ,arriage, and means -tor moving the carriage.

il. fr machine ot the class described, having, in combination, a guideway for a nail block having a cover plate, a stop tor the cover plate, and means :tor elevating the nails in the nail block so that they may be moved over the cover plate.

5. it machine of the class described, having, in combination, a guideway having a series ot nail passages, acover plate disposed in the guideway at one side of the passages, a nail. block movable across the passages, and means for simultaneously shitting the cover plate to cover the pas-y sages and elevating the nails so that they maj,v be carried over the cover plate.

t3. A machine of the class described, baving, in combination, a horizontal guideway tor a nail bloclr, vertically movable section in the guideway, and means tor raising or lowering said section.

7. fr machine ot the class described, having, in combination, a guideway for a nail bloclr, a movable section inthe guideway, and a cover plate shitting device arranged to raise or lower the movable section.

8. .d machine or the class described, having, in combination., a guide'wav, a carriage for a nail bloclr freely movable in one direction in said guideway, and means for retarding the movement oi' the carriage in the other direction.

am JW J ing, in combination, nail s g" means, a loader movable between suppliriglig n leans and a die bloclr and intermediate nail transferring means including 'tleirible guiding tubes, a removable toot plate to which the tubes run. and means lor detachablg7 holding the root plate in place.

ll. 'if-lr machine oi? the class described, having, in combination, nail supplying` ineens, a loader, and 'transferring means between the supplying `means and loader inchiding a :traine havingparallel aries with supporting dang-es, iienible guiding tubes, a 'toot plate resting on the ilanges or the arms and receiving the lower ends oit the tubes, and means :tor deiachablT holding the toot plate in place.

19:. lr machine olf the class described, having, in con'ibination, a nail bloclr, a guideway for said nail bloeit, a pivot-ally mounted loader and connecting mechanism constructed and arranged to advance the nail block to deliver a load oit nails when the loader is swung into nail receiving position.

13. it ina-chine oi the class described, having, in combination, a movable nail bloclr, means for advancing the nail bloclr to deliver successive loads oit nails, and a locking device Yfor holding said means against operation until a previously delivered load oit nails has been utilised.

lfl. ltr machine oft the class described, having, in combination, a movable nail bloclr, a loader i'or conveying nails delivered trom the nail block, means :tor advancing the nail bloclr to deliver successive loads et nails, and a loclring device ttor said means arranged to be controlled by the movement oi? the loader.

15. A. machine ot the class described having, in combination, a nail bloclr, a guidewav therelor, a pivotally mounted loader and means constructed and arranged to advance the nail bloeit to deliver a load oit nails when the loader is swung into nailreceiving position, and a locking device *for holding said means against operation until the loader moves into nail discharging position.

16. A machine oit the class described having, in combination, nail supplying means, a loader movable between said nail supplying means and a die bloclr located over the heel to be nailed, and a locking device controlled by movement of the loader to prelllti llZli Mld vent said means from supplying a second load of nails to the loader until the previous load has been delivered to the die block.

17. A machine of the class described having, in combination, nail supplying means including an actuator, a pivotally mounted loader movable between said means and a die block, and a lock for said actuator controlled by movement of the loader When the loader is moved into nail-discharging position.

18. A machine of the class described having, in combination, nail supplying means including an actuator, a loader movable between said means and a die block, and a lock controlled by the loader and arranged to prevent operation of said actuator to deliver a second load of nails until the loader has delivered a previous load to the die block.

19. A machine of the class described having, in combination, a nailblock, a guide- Way therefor, a movably mounted loader, means for advancing the nail block to deliver a load of nails when the loader moves into nail-receiving position, and a locking device to prevent said advancing means from delivering` a second load of nails until the loader moves into nail-discharging position.

20. A machine of the class described having, in combination, a nail block, a guide- Way therefor, means for advancing the nail block to deliver a load of nails when the loader moves into nail-receiving position, and a locking device actuated by the loader, and arranged to prevent said advancing means from delivering a second load o1 nails to the loader until said loader moves into nail-discharging position.

In testimony whereof I have signed my nalne to this specification.

JOSEPH H. POPE. 

